Weatherstripping



May 16, 1939. PR. oFTi-:DAL Er AL 2,158,298

WEATHER'STRIPPING Filed Aug". 13, 1937 Patented May 16, 1939 UNITED STATES WEATHERSTRIPPING` Philip R. Oftedal and Donald G. Kingsley, Chicago, Ill.

Application August 13,

2 Claims.

The invention relates generally to weatherstrips for windows, and more particularly it relates to weatherstrips for use in sealing the lower edge of .windows which are opened by vertical 6 shifting movement away from the lowersill.

Weatherstripping for use on sills usually embodies an upwardly projecting sealing rib adapted to be engaged by a groove in the lower edge of the sash as the sash is lowered. If, when the l window is open during freezing weather, moisture has accumulated on a conventional weatherstrip inwardly of the sealing rib, such moisture usually freezes `and makes it impossible to properly close the window. Such interference vwith the window operation is, of course, objectionable.

The primary object of the present invention is, therefore, to provide a new and improved sill weatherstrip of this general type constructed to prevent accumulation of moisture inwardly of the sealing rib, whereby to insure against freezing of such moisture in the downward path of the window sash.

Another object is to provide such a self-draining sill weatherstripping which is simple and eilicient in construction and operation.

Other objects and advantages will become apparent from the following description, taken in connection with the accompanying drawing, in which:

Fig. 1 is a vertical cross sectional view of a window sill and sash construction associated with a weatherstrip embodying the features of the invention.

Fig. 2 is anenlarged portion of Fig. 1 showing the details of construction of the weatherstripping.

Fig. 3 is a perspective View of the weatherstrip.

For purposes of disclosure, we have illustrated in the drawing and will hereinafter describe in detail the preferred -embodiment of the invention, with the understanding that we do not intend to limit our invention to the particular construction and arrangement shown, it being contemplated that various changes may be made by those skilled in the art without departing from the spirit and scope of the appended claims.

In the form chosen for disclosure herein the invention is embodied in a sill weatherstrip IIJ mounted in proper sealing relation on a conventional outwardly sloping sill I I in the path of a vertically shiftable lower sash I2. In its lower edge the sash I2 has a longitudinally extending downwardly Iacing groove I3 which, in the lowermost or closed position of the sash I2, embraces an upwardly extending longitudinal 1937, Serial No. 158,891 (c1. ,2o- 69) sealing rib I4 which forms a part of the weatherstrip IU. l

The present weatherstrip preferably comprises a base having inner and outer sections I6 and I'I at the juncture of which sections the sealing 5 rib I4 is formed. In the preferred form an inner bead I8 is formed on the inner base section I6 adjacent to its inner edge I9 in such a position that the bead I8 engages the inner face of thev lowered sash and thereby aids in producing proper Asealing of the sash along the sill II. Means is provided for securing the weatherstrip in place on the sill, and this means preferably takes the form of a nailing flange 20 located at the outer edge of the outer base section I'I, 15 through which flange nails 2| may be driven into the sill Il.

When a window, such as the one herein shown, is opened during freezing weather, it often hap pens that the heat from the room melts snow or ice about the Window so as to deposit water in a confined position on the base section I6 between the bead I8 and the sealing rib i4. 'Ihis water, due to the outward slope (usually about 7 degrees) of the sill, accumulates adjacent to the,k inner side ofthe rib I4, and in many cases the water freezes in this location so as to prevent proper'closure of the window.

In accordance with the present invention provision is made for draining this water from the inner base section I6 before it becomes sufciently chilled to freeze, and the means for attaining this result is so constructed and arranged as to insure proper sealing of the window sash.

Thus there is provided a drainage means which may consist of one or more relatively small drainage ports 25 opening through the rib I4 adjacent to its lower extremity so that water on the base section I6 may drain outwardly oif of said section and through said rib. To dispose of the water on the other side of the rib, the out-er base section II is formed from two spaced generally parallel walls 26 and 2'I, which are joined at their outer edges by an upright f connecting wall 28, the lower wall 26 being connected to the nailing flange 20. The lower wall 26 receives the water from the ports 25, and since the wall 26 slopes outwardly at substantially the slope of the sill I I, the water is drained to discharge ports 3|) formed in the upright connecting wall 28. These ports 30 are arranged in staggered relation to the ports 25 as shown in Fig. 3 so as. to retard air orw through the ports.

In the preferred form herein shown, the

weatherstrip is constructed from a single relativelythin sheet or strip of metal such as zinc, and all of the elements thus far described are formed by suitable bending and forming of this single sheet. Thus the bead I8 is formed by suitable bending and forming of sheet adjacent to the edge I9 of the sheet, and this edge beyond the bead I8 may extend inwardly along the sill as an additional securing ange, or may be doubled outwardly beneath the strip as desired.

Outwardly of the bead |18, the strip extends substantially parallel to the upper face of the sill for a considerable distance to form the inner base section I5, and is then bent upwardly as at 3| to form the inner wall of the sealing rib I4. After being bent to a rounded shape `at 32 to form the top of the rib I4, the sheet extends downwardly to form the outer wall 33 of the rib. At the lower edge of the outer wall of the rib, which is at a point located at a higher level than the point 3 I, the sheet is bent forwardly or outwardly to form the upper wall 21 or upper drainage shelf of the outer base section I'I, and is then bent downwardly to provide the upright connecting wall 28.

At the lower edge of the upright wall 28, the sheet is bent outwardly, and then folded back inwardly to form the nailing ilange 20, and the lower layer of the ange 20 extends inwardly to form the lower drainage wall 26 of the outer base section I'I. It will be noted that the portion of the sheet which forms the wall 26 extends inwardly to a point 34 beneath the inner base section I6, that is, beyond the point 3| of the inner side of the sealing rib I4. Hence Water from the ports 25 is drained onto the drainage wall 26. The inner edge 34 of the wall 26 may, of course, be secured to the base I6 if desired.

Since the rib I4 has inner and outer walls of different lengths which are differently associated with the base, and since the device is usually constructed from a relatively thin sheet of metal, means is preferably provided to impart added strength and balance to the rib. This means preferably comprises an interior support which may vtake the form of a rigid filler member 35 encased within the rib I4 and having a :dat surface engagement with the base wall 26 so as to insure upright positioning of the rib. The ports 25 are, of course, continued as at 25' through the filler member 35.

From the foregoing it will Vbe evident that the present invention provides a new and improved sill weatherstripping, which by reason of its self draining characteristics, insures proper sealing of the window at the sill.

It will also be apparent that the present selfdraining sill weatherstripping is simple in construction, and may be economically constructed and installed.

We claim as our invention:

l. A sill weatherstrip of the character described comprising an elongated strip of sheet metal bent to form a longitudinal, upstanding sealing rib with the strip on opposite sides of the rib extending from the base of the rib in substantially parallel vertically spaced planes, the lower extending portion forming a base wall adapted to be located beneath the inner edge of a sash and having an upstanding flange formed thereon adapted to engage the inner face of the sash, the upper one of said portions being adapted to be positioned beneath -the outer edge of the window sash and constituting an upper drain shelf, said strip being bent downwardly to form an outer supporting wall and then outwardly in substantially the plane of said base wall to form an attachment flange, and then being reversely bent to extend inwardly in spaced relation to said upper drain shelf to form a lower drain wall extending to a point beneath said base wall, said rib having an opening therein through which water may drain outwardly onto said lower drain wall,

and said outer supporting wall having an opening therein for the discharge of water from said drain wall.

2. A sill weatherstrip adapted to be positioned on an outwardly sloping sill beneath the lower edge of a vertically shiftable sash which is provided with a sealing groove, said sill weatherstripping comprising a base portion adapted to rest on the sill beneath the window, a sealing rib formed on said vbase longitudinally thereof intermediate the inner and outer edges of said base and adapted togbe embraced by said groove when the sash is in its lowered position, said base outwardly of said rib being formed to provide a drainage chamber defined by a sloping lower drainage wall, .an upper drainage shelf and an ,y 

